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Mid Range Driver
  • Heavy-duty cast aluminium chassis for increased rigidity
  • Mid range transducer suitable for either direct radiating or horn loaded applications
  • Smooth response for easy integration across vocal frequency band


12" / 300 mm

Coil Diameter

2.5" / 63.5 mm

Power Rating

300 w (A.E.S.)

Frequency Range

100 Hz - 6 kHz


99 dB


2.7 mm
SKU: PD.121.8 Category:

Sorry, this product is out of manufacture and no longer available.

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General Specifications
Type Mid Range Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 12" / 300 mm
Voice Coil Diameter 2.5" / 63.5 mm
Peak Power (6 dB Crest Factor) * 1200 w (A.E.S.)
Power Rating 1 2 * 300 w (A.E.S.)
Sensitivity (1W/ 1m) * 99 dB
Frequency Range 100 Hz - 6 kHz
Resonance 53.27 Hz
Voice Coil Winding Depth 12 mm / 0.47"
Recommended Enclosure Volume 10 - 60 Litres
Flux Density 1.5 Tesla
Magnet Material Ceramic
Magnet Gap Depth 9 mm / 0.35"
Former Material Glass Fibre
Dust Dome Material Paper
Voice Coil Material Copper
Cone Material Paper
Suspension Material Fabric
Surround Material Fabric
Thiele Small Parameters
Fs 53.27 Hz
Re 5.93 Ω
Qms 14.66
Qes 0.23
Qts 0.23
Le (@ 1 kHz) 0.42 mh
Vas 66.58 litres
Mms 65.37 g
Sd 530.93 cm2
Cms 168.33 µm/N
BL 21.46 T/m
Xmax 2.7 mm
Vd 0.143 litres
Ref. Efficiency 5.10%
EBP 231.60 Hz
Dimensions & Mounting
Overall Diameter 330 mm
Width Across Flats 320.5 mm
Flange Height 10 mm
Depth (Excl. Flange) 115 mm
Magnet Diameter 200 mm
Chassis Shoulder Diameter 282 mm
Outer Bolt Circle 6 * M6 on 318mm PCD
Inner Bolt Circle 8 * M6 on 293mm PCD
Shipping Information
Nett Weight 9.2 Kg / 20.28 lb.
Shipping Weight 10 Kg / 22.05 lb.
*1 Power compression is the reduction of sensitivity at the specified power. Higher power ratings do not necessarily give a proportionate increase in SPL therefore the maximum SPL of the driver may significantly exceed that of other manufacturers with high power ratings.

1. AES Standard (60 to 600 Hz) Program 600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 300 Watt preconditioning period.

Please note that frequency response measurements are supplied for comparison purposes only and are not a measure of the low frequency performance which may be achievable in a fully optimised system.
Frequency Response & Impedance
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